INVESTIGATION OF THE NATURAL SANDY COAST EROSION: A CASE STUDY OF HEBEI PROVINCE
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摘要: 在系统分析河北省自然状态沙质海岸长期演变的基础上,运用"一线理论"及我国《海港水文规范》中的规范公式,建立海岸侵蚀数学模型,经2000、2006年实测数据验证,表明所建立模型的各参数确定合理,较真实地复演岸线侵蚀特征,可用于自然状态沙质海岸在较长时期内侵蚀预测。根据岸线的预测数据得出如下结论:2006—2026年,岸线整体后退速率不断减小,各岸段侵蚀速率有所不同。至2006年,戴河-洋河段侵蚀状态已基本停止,并逐渐趋于平衡;洋河大蒲河段仍为侵蚀最严重地区,且侵蚀中心不断向南移动;大蒲河塔子沟段受蚀速率明显减小,但随着侵蚀进一步进行以及沙源的减少,冲刷范围逐渐南移,将成为新的侵蚀中心地区。Abstract: A mathematic model for the coastal evolution has been established by one-line theory and the normal expressions of the"Code of Hydrology for Sea Harbour"of China,based on analysing the long-time evolution of the natural sandy coast in Hebei Province. The model is proved to be true and reasonable after verifying the measuring data in 2000 and 2006, so it can be used to simulate long-term evolution of the coastal line,and forecast the erosion condition of the natural sandy coast as well. The result.s of the study show that the erosion scope would move towards the south,and the region from Dapu River to Tazigou will become the center area of erosion by 2026,and the conclusion can also be applied to protecting the natural sandy coast.
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Key words:
- sandy coast /
- coastal erosion /
- one-line theory /
- forecast modeling /
- Hebei Province
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